Moreover, you could embed one layout component into another to divide the area into more regions as follows,

<borderlayout height="500px">
    <north size="30%">    
        <borderlayout height="250px">        
            <west border="normal">            

                Inner West                
            </west>            
            <center>            
                Inner Center                
            </center>            
            <east size="50%" border="normal">            
                Inner East                
            </east>            
        </borderlayout>        
    </north>    
    <center border="normal">    
        <borderlayout>        
            <west border="normal">            
                Inner West                
            </west>            
            <center border="normal">            
                Inner Center                
            </center>            
            <east size="30%" border="normal">            
            </east>            
        </borderlayout>        
    </center>    
</borderlayout>